Fig. 8
a Amperometric responses of (a 1 ) PNPG + enzyme, (a 2 ) PNPG + enzyme + 1.0 mg/mL extracts, (a 3 ) PNPG + enzyme + 2.0 mg/mL extracts, (a 4 ) PNPG + enzyme + 3.0 mg/mL extracts, (a 5 ) PNPG + enzyme + 4.0 mg/mL extracts, and (a 6 ) PNPG. b Amperometric response of biosensor with stirring using different concentration Tebengau plant extracts